.clear{
    display: block;
    clear: both;
}
img {
    max-width: 100%;
}
.banner {
    width: 100%;
    height: 600px;
    background: url(../img/new-banner.jpg) center center;
    background-size: auto 100%;
}
.product_box{
    width: 1080px;
    margin: 0 auto 20px;
    min-height: 500px;

}
.contact-box {
    width: 1080px;
    margin: 15px auto;
}
.contact-box .top {
    height: 40px;
    border-bottom: 1px solid #dfdfe6;
    width: 1080px;
    margin: 15px auto;
}
.contact-box .top .left {
    float: left;
    font-size: 18px;
    font-weight: bold;
}
.contact-box .top .position {
    float: right;
}

.product_left {
    line-height: 57px;
    width: 200px;
    text-align: center;
    font-size: 17px;
    font-weight: 500;
    border-top: 1px solid #ccc;;
    border-bottom: 1px solid #ccc;
    float: left;
}

.product_left li:nth-child(1) {
    font-size: 20px;
    font-weight: bold;
    border-top: 0;
    user-select: none;
}
.product_left li:nth-child(1):hover{
    border-left:1px solid #ccc;
}
.product_left li {
    border-top: 1px solid #ccc;
    border-left: 1px solid #ccc;;
    border-right: 1px solid #ccc;;
}
.product_left li a {
    display: block;
    background: #fff;
}
.product_left li:hover{
    border-left: 5px solid rgb(250,127,0);
}
.product_left li a:hover{
    color: rgb(250,127,0);
    background: #f9f9f9;
}


.product_right {
    width: 860px;
    float: right;
}

.product_label_box {
    margin-bottom: 50px;
}